Trinity: Souls of Zill O'll is an action fantasy role-playing video game set in part of the Zill O'll series. The game is a prequel, taking place five years before the events in Zill O'll. Downloadable content that included additional quests and alternate costumes for the main party was released only in Japan and was not translated for other regions.

Trinity: Souls of Zill O'll is an action fantasy role-playing video game set in part of the Zill O'll series. The game is a prequel, taking place five years before the events in Zill O'll. Downloadable content that included additional quests and alternate costumes for the main party was released only in Japan and was not translated for other regions.